Reduced-tap filter in a demodulator

Details Reduced-tap filter in a demodulator Reduced-tap filter in a demodulator

1998-03-16

1999-10-19

Grimm, Siegfried H.

Demodulators

Phase shift keying or quadrature amplitude demodulator

329307, 375326, 375327, 375343, H04L 2738

Patent

active

059695706

ABSTRACT:
A demodulator with a filter having a reduced number of filter taps without a sacrifice in filter accuracy. The demodulator includes elements that generate a data stream that carries a component of an input signal in response to a data stream that carries samples of the input signal. The demodulator also includes elements that generate a sample clock for sampling the input signal such that the sample clock is preselected to cause the data stream that carries the component to carry alternating samples that are substantially equal to zero. The filter in the demodulator has a set of filter taps which are arranged to tap only the samples in the data stream that carries the component that are not substantially equal to zero.

REFERENCES:
patent: 5311545 (1994-05-01), Critchlow
patent: 5610948 (1997-03-01), Ninomiya et al.
patent: 5692013 (1997-11-01), Koslov et al.

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